25x^2-56x=16

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Solution for 25x^2-56x=16 equation:


Simplifying
25x2 + -56x = 16

Reorder the terms:
-56x + 25x2 = 16

Solving
-56x + 25x2 = 16

Solving for variable 'x'.

Reorder the terms:
-16 + -56x + 25x2 = 16 + -16

Combine like terms: 16 + -16 = 0
-16 + -56x + 25x2 = 0

Begin completing the square.  Divide all terms by
25 the coefficient of the squared term: 

Divide each side by '25'.
-0.64 + -2.24x + x2 = 0

Move the constant term to the right:

Add '0.64' to each side of the equation.
-0.64 + -2.24x + 0.64 + x2 = 0 + 0.64

Reorder the terms:
-0.64 + 0.64 + -2.24x + x2 = 0 + 0.64

Combine like terms: -0.64 + 0.64 = 0.00
0.00 + -2.24x + x2 = 0 + 0.64
-2.24x + x2 = 0 + 0.64

Combine like terms: 0 + 0.64 = 0.64
-2.24x + x2 = 0.64

The x term is -2.24x.  Take half its coefficient (-1.12).
Square it (1.2544) and add it to both sides.

Add '1.2544' to each side of the equation.
-2.24x + 1.2544 + x2 = 0.64 + 1.2544

Reorder the terms:
1.2544 + -2.24x + x2 = 0.64 + 1.2544

Combine like terms: 0.64 + 1.2544 = 1.8944
1.2544 + -2.24x + x2 = 1.8944

Factor a perfect square on the left side:
(x + -1.12)(x + -1.12) = 1.8944

Calculate the square root of the right side: 1.376372043

Break this problem into two subproblems by setting 
(x + -1.12) equal to 1.376372043 and -1.376372043.

Subproblem 1

x + -1.12 = 1.376372043 Simplifying x + -1.12 = 1.376372043 Reorder the terms: -1.12 + x = 1.376372043 Solving -1.12 + x = 1.376372043 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.12' to each side of the equation. -1.12 + 1.12 + x = 1.376372043 + 1.12 Combine like terms: -1.12 + 1.12 = 0.00 0.00 + x = 1.376372043 + 1.12 x = 1.376372043 + 1.12 Combine like terms: 1.376372043 + 1.12 = 2.496372043 x = 2.496372043 Simplifying x = 2.496372043

Subproblem 2

x + -1.12 = -1.376372043 Simplifying x + -1.12 = -1.376372043 Reorder the terms: -1.12 + x = -1.376372043 Solving -1.12 + x = -1.376372043 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.12' to each side of the equation. -1.12 + 1.12 + x = -1.376372043 + 1.12 Combine like terms: -1.12 + 1.12 = 0.00 0.00 + x = -1.376372043 + 1.12 x = -1.376372043 + 1.12 Combine like terms: -1.376372043 + 1.12 = -0.256372043 x = -0.256372043 Simplifying x = -0.256372043

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.496372043, -0.256372043}

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